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      Chronogram
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      <h1>
        Chronogram
      </h1>
      <blockquote>
        <em>Subsections:</em><br>
        <a href="selection.html">Signal selection</a><br>
        <a href="timetable.html">Chronogram window</a>
      </blockquote>
      <p>
        To understand or debug a circuit it is often very useful to be able to observe the different signals in a visual way. This is the purpose of the timeline. This module allows the recording of signals in graphical form or in a table of value in a text file.
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      <p align="center">
        <img src="../../../img-guide/log-graph1.png" alt="#########">
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      <p>
        You can enter the logging module via the menu <b class=menu>|&nbsp;Simulate&nbsp;|</b>→<b class=menu>|&nbsp;Chronogram&nbsp;|</b>. It brings up the signal selection window.
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      <p>
        The circuit below is an illustrative example for the timing module.<br>
      </p>
      <p align="center">
        <img class="notscal" src="../../../../img-guide/log-counter.png" alt="#########">
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      <p>
        These are the clocks that serve as a driver for displaying signals. The simulation knows two particular clocks. One is imperative and named <var>sysclk</var> and another optional and secondary named <var>clk</var>
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      <p>
        <b class=note>Note:</b> it is imperative that a clock named <var>sysclk</var> appears in your circuit. It will be used as a time base by the chronogram module. It does not have to be connected to your circuit. It is in principle the fastest and is set to a duty cycle 1/1 tic.
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      <p>
        <b>Next:</b> <a href="selection.html">The Selection tab</a>.
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